/**
 * Copyright since 2025 Mifos Initiative
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 */

import { Component, OnInit, OnDestroy, inject } from '@angular/core';
import { CommonModule } from '@angular/common';
import { MatDialogRef, MatDialogModule, MAT_DIALOG_DATA } from '@angular/material/dialog';
import { MatProgressBarModule } from '@angular/material/progress-bar';
import { MatButtonModule } from '@angular/material/button';
import { FaIconComponent } from '@fortawesome/angular-fontawesome';
import { ClientsService } from 'app/clients/clients.service';

@Component({
  selector: 'mifosx-sanctions-verify-dialog',
  template: `
    <h2 mat-dialog-title>
      <fa-icon icon="shield-alt" class="dialog-title-icon"></fa-icon>
      Sanctions Verification
    </h2>
    <mat-dialog-content>
      @if (verifying) {
        <div class="progress-section">
          <mat-progress-bar mode="determinate" [value]="progressValue" color="primary"></mat-progress-bar>
          <div class="progress-percent">{{ progressValue }}%</div>
          <div class="progress-steps">
            @for (step of progressSteps; track step.label; let i = $index) {
              <div class="progress-step" [class.active]="i === currentStep" [class.done]="i < currentStep">
                <fa-icon
                  [icon]="i < currentStep ? 'check-circle' : step.icon"
                  [class.done-icon]="i < currentStep"
                ></fa-icon>
                <span>{{ step.label }}</span>
              </div>
            }
          </div>
          <p class="sanctions-msg">
            Screening <strong>{{ clientName }}</strong> against<br />
            <strong>UN Security Council</strong> &amp;
            <strong>Financial Intelligence Unit - India (FIU-IND under UNSC Resolution 2231)</strong>
          </p>
        </div>
      }
      @if (!verifying && !matchFound && !errorOccurred) {
        <div class="approve-card">
          <div class="approve-icon-ring">
            <fa-icon icon="shield-alt" class="approve-shield"></fa-icon>
          </div>
          <div class="approve-badge">CLEARED</div>
          <h3 class="approve-title">No Sanctions Match Found</h3>
          <p class="approve-detail">
            <strong>{{ clientName }}</strong> has been screened against the
            <strong>UN Security Council Consolidated List</strong> and <strong>FIU-IND</strong> records. No confirmed
            match was found.
          </p>
          <div class="approve-meta">
            <div class="meta-row">
              <span class="meta-label">Screened On</span>
              <span class="meta-value">{{ screenedDate }}</span>
            </div>
            <div class="meta-row">
              <span class="meta-label">Status</span>
              <span class="meta-value meta-clear">Customer is Clear</span>
            </div>
            <div class="meta-row">
              <span class="meta-label">Database</span>
              <span class="meta-value">UN SC Consolidated List</span>
            </div>
          </div>
        </div>
      }
      @if (!verifying && matchFound) {
        <div class="reject-card">
          <div class="reject-icon-ring">
            <fa-icon icon="ban" class="reject-shield"></fa-icon>
          </div>
          <div class="reject-badge">CONFIRMED MATCH / REFER</div>
          <h3 class="reject-title">Sanctions Match Found</h3>
          <p class="reject-detail">
            <strong class="reject-name">{{ clientName }}</strong> matched against
            <strong>UN SC Consolidated List</strong>.
          </p>
          <div class="reject-meta">
            <div class="meta-row">
              <span class="meta-label">Screened On</span>
              <span class="meta-value">{{ screenedDate }}</span>
            </div>
            <div class="meta-row">
              <span class="meta-label">Status</span>
              <span class="meta-value meta-danger">Match Found — Blocked</span>
            </div>
            <div class="meta-row">
              <span class="meta-label">Database</span>
              <span class="meta-value">UN SC Consolidated List</span>
            </div>
          </div>
          <div class="escalate-banner">
            <fa-icon icon="exclamation-circle" class="escalate-icon"></fa-icon>
            <span><strong>Escalate to Principal Officer immediately.</strong> Account opening blocked.</span>
          </div>
        </div>
      }
      @if (!verifying && errorOccurred) {
        <div class="sanctions-result">
          <fa-icon icon="exclamation-circle" class="result-icon warning"></fa-icon>
          <p class="result-msg warning">Verification failed. Please try again.</p>
          <p class="result-detail">{{ errorMessage }}</p>
        </div>
      }
    </mat-dialog-content>
    <mat-dialog-actions align="end">
      @if (!verifying && !matchFound && !errorOccurred) {
        <button mat-stroked-button (click)="close(true)" class="approve-btn-secondary">Dismiss</button>
        <button mat-raised-button color="primary" (click)="close(true)" class="approve-btn">
          <fa-icon icon="check"></fa-icon> Mark as Clear
        </button>
      }
      @if (!verifying && matchFound) {
        <button mat-raised-button color="warn" (click)="close(false)" class="reject-btn">
          <fa-icon icon="times"></fa-icon> Flag &amp; Escalate
        </button>
      }
      @if (!verifying && errorOccurred) {
        <button mat-raised-button (click)="close(false)">Close</button>
      }
    </mat-dialog-actions>
  `,
  styles: [
    `
      :host {
        display: block;
        min-width: 500px;
      }

      h2[mat-dialog-title] {
        display: flex;
        align-items: center;
        gap: 8px;
        margin: 0;
        padding: 16px 24px;
        font-size: 18px;
        font-weight: 600;
        color: #1074b9;
      }

      .dialog-title-icon {
        font-size: 20px;
      }

      mat-dialog-content {
        padding: 16px 24px;
        max-height: unset;
        overflow: visible;
      }

      .progress-section {
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 12px;
      }

      .progress-percent {
        font-size: 13px;
        font-weight: 700;
        color: #1074b9;
      }

      .progress-steps {
        display: flex;
        flex-direction: column;
        gap: 10px;
        width: 100%;
        padding: 8px 16px;
      }

      .progress-step {
        display: flex;
        align-items: center;
        gap: 8px;
        font-size: 13px;
        color: #9ca3af;
        transition: color 0.3s ease;
      }

      .progress-step.active {
        color: #1074b9;
        font-weight: 600;
      }

      .progress-step.done {
        color: #388e3c;
      }

      .done-icon {
        color: #388e3c;
      }

      .sanctions-msg {
        font-size: 14px;
        color: #555;
        line-height: 1.6;
        margin: 4px 0 0;
        text-align: center;
      }

      .approve-card {
        display: flex;
        flex-direction: column;
        align-items: center;
        padding: 20px 16px;
        gap: 12px;
      }

      .approve-icon-ring {
        width: 64px;
        height: 64px;
        border-radius: 50%;
        background: linear-gradient(135deg, #ecfdf5, #d1fae5);
        display: flex;
        align-items: center;
        justify-content: center;
        border: 3px solid #a7f3d0;
      }

      .approve-shield {
        font-size: 28px;
        color: #059669;
      }

      .approve-badge {
        display: inline-block;
        font-size: 11px;
        font-weight: 800;
        letter-spacing: 1.5px;
        color: #059669;
        background: #ecfdf5;
        border: 1px solid #a7f3d0;
        padding: 3px 14px;
        border-radius: 20px;
      }

      .approve-title {
        font-size: 17px;
        font-weight: 700;
        color: #111827;
        margin: 0;
      }

      .approve-detail {
        font-size: 13px;
        color: #6b7280;
        text-align: center;
        line-height: 1.6;
        margin: 0;
        max-width: 400px;
      }

      .approve-meta {
        width: 100%;
        background: #f9fafb;
        border: 1px solid #e5e7eb;
        border-radius: 8px;
        padding: 12px 16px;
        margin-top: 4px;
      }

      .meta-row {
        display: flex;
        justify-content: space-between;
        padding: 6px 0;
        border-bottom: 1px solid #f3f4f6;
      }

      .meta-row:last-child {
        border-bottom: none;
      }

      .meta-label {
        font-size: 12px;
        color: #9ca3af;
        font-weight: 500;
      }

      .meta-value {
        font-size: 12px;
        color: #374151;
        font-weight: 600;
      }

      .meta-clear {
        color: #059669;
      }

      .approve-btn {
        display: flex;
        align-items: center;
        gap: 6px;
      }

      .approve-btn-secondary {
        margin-right: 8px;
      }

      .reject-card {
        display: flex;
        flex-direction: column;
        align-items: center;
        padding: 20px 16px;
        gap: 12px;
      }

      .reject-icon-ring {
        width: 64px;
        height: 64px;
        border-radius: 50%;
        background: linear-gradient(135deg, #fef2f2, #fecaca);
        display: flex;
        align-items: center;
        justify-content: center;
        border: 3px solid #fca5a5;
      }

      .reject-shield {
        font-size: 28px;
        color: #dc2626;
      }

      .reject-badge {
        display: inline-block;
        font-size: 11px;
        font-weight: 800;
        letter-spacing: 1.5px;
        color: #dc2626;
        background: #fef2f2;
        border: 1px solid #fecaca;
        padding: 3px 14px;
        border-radius: 20px;
      }

      .reject-title {
        font-size: 17px;
        font-weight: 700;
        color: #111827;
        margin: 0;
      }

      .reject-detail {
        font-size: 13px;
        color: #6b7280;
        text-align: center;
        line-height: 1.6;
        margin: 0;
      }

      .reject-name {
        color: #dc2626;
      }

      .reject-meta {
        width: 100%;
        background: #f9fafb;
        border: 1px solid #e5e7eb;
        border-radius: 8px;
        padding: 12px 16px;
      }

      .meta-danger {
        color: #dc2626;
      }

      .escalate-banner {
        display: flex;
        align-items: center;
        gap: 10px;
        width: 100%;
        background: #dc2626;
        color: #fff;
        padding: 10px 14px;
        border-radius: 6px;
        font-size: 12px;
        line-height: 1.5;
      }

      .escalate-icon {
        font-size: 18px;
        flex-shrink: 0;
      }

      .reject-btn {
        display: flex;
        align-items: center;
        gap: 6px;
      }

      .sanctions-result {
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 8px;
        padding: 16px 0;
      }

      .result-icon {
        font-size: 48px;
      }

      .result-icon.success {
        color: #388e3c;
      }
      .result-icon.danger {
        color: #d32f2f;
      }
      .result-icon.warning {
        color: #f57c00;
      }

      .result-msg {
        font-size: 16px;
        font-weight: 600;
        margin: 0;
        text-align: center;
      }

      .result-msg.success {
        color: #388e3c;
      }
      .result-msg.danger {
        color: #d32f2f;
      }
      .result-msg.warning {
        color: #f57c00;
      }

      .result-detail {
        font-size: 14px;
        color: #555;
        text-align: center;
        margin: 4px 0;
      }

      .match-list {
        width: 100%;
        max-height: unset;
        overflow: visible;
        margin: 8px 0;
      }

      .match-item {
        background: #fce4ec;
        border-left: 4px solid #d32f2f;
        padding: 8px 12px;
        margin-bottom: 6px;
        border-radius: 4px;
      }

      .match-name {
        font-weight: 600;
        font-size: 14px;
        color: #333;
      }

      .match-meta {
        display: flex;
        gap: 8px;
        margin-top: 4px;
        flex-wrap: wrap;
      }

      .match-type,
      .match-ref,
      .match-list-type {
        font-size: 11px;
        padding: 2px 6px;
        border-radius: 3px;
        background: #ffcdd2;
        color: #b71c1c;
      }

      .match-aliases {
        font-size: 12px;
        color: #666;
        margin-top: 4px;
      }

      .block-msg {
        font-size: 14px;
        font-weight: 600;
        color: #d32f2f;
        background: #ffebee;
        padding: 10px 16px;
        border-radius: 4px;
        text-align: center;
        margin-top: 8px;
        width: 100%;
      }

      mat-dialog-actions {
        padding: 8px 24px 16px;
      }
    `
  ],
  imports: [
    CommonModule,
    MatDialogModule,
    MatProgressBarModule,
    MatButtonModule,
    FaIconComponent
  ]
})
export class SanctionsVerifyDialogComponent implements OnInit, OnDestroy {
  private dialogRef = inject(MatDialogRef<SanctionsVerifyDialogComponent>);
  private data: { name: string } = inject(MAT_DIALOG_DATA);
  private clientsService = inject(ClientsService);

  clientName = '';
  verifying = true;
  matchFound = false;
  matchCount = 0;
  matches: any[] = [];
  errorOccurred = false;
  errorMessage = '';
  screeningLogId: number | null = null;

  screenedDate = new Date().toLocaleDateString('en-IN', { day: '2-digit', month: 'short', year: 'numeric' });
  progressValue = 0;
  currentStep = 0;
  progressSteps = [
    { label: 'Connecting to UN Security Council database...', icon: 'globe' as any },
    { label: 'Screening name against consolidated list...', icon: 'search' as any },
    { label: 'Cross-checking FIU-IND records...', icon: 'database' as any },
    { label: 'Analyzing results...', icon: 'chart-bar' as any }
  ];

  private progressTimer: any;
  private apiResult: any = null;
  private apiError: any = null;
  private apiDone = false;

  ngOnInit() {
    this.clientName = this.data?.name || '';
    this.dialogRef.disableClose = true;

    // Start API call immediately
    this.clientsService.screenSanctions(this.clientName).subscribe({
      next: (result: any) => {
        this.apiResult = result;
        this.apiDone = true;
      },
      error: (err: any) => {
        this.apiError = err;
        this.apiDone = true;
      }
    });

    // Animate progress through steps
    this.runProgress();
  }

  private runProgress() {
    const stepDurations = [
      1200,
      1500,
      1800,
      1000
    ]; // ms per step
    const totalDuration = stepDurations.reduce((a, b) => a + b, 0);
    let elapsed = 0;
    const interval = 50;

    this.progressTimer = setInterval(() => {
      elapsed += interval;

      // Calculate which step we're on
      let accum = 0;
      for (let i = 0; i < stepDurations.length; i++) {
        accum += stepDurations[i];
        if (elapsed <= accum) {
          this.currentStep = i;
          break;
        }
      }

      // Update progress bar
      this.progressValue = Math.min(Math.round((elapsed / totalDuration) * 95), 95);

      // After all steps are done, wait for API then finish
      if (elapsed >= totalDuration) {
        if (this.apiDone) {
          this.finishVerification();
        } else {
          // API still running — hold at 95% until done
          this.currentStep = stepDurations.length - 1;
          this.progressValue = 95;
          clearInterval(this.progressTimer);
          this.progressTimer = setInterval(() => {
            if (this.apiDone) {
              this.finishVerification();
            }
          }, 100);
        }
      }
    }, interval);
  }

  private finishVerification() {
    clearInterval(this.progressTimer);
    this.progressValue = 100;
    this.currentStep = this.progressSteps.length;

    // Small delay after 100% before showing result
    setTimeout(() => {
      this.verifying = false;
      this.dialogRef.disableClose = false;

      if (this.apiError) {
        this.errorOccurred = true;
        this.errorMessage =
          this.apiError?.error?.message ||
          this.apiError?.message ||
          'Unable to connect to sanctions screening service.';
      } else {
        this.screeningLogId = this.apiResult?.screeningLogId || null;
        if (this.apiResult?.matchFound) {
          this.matchFound = true;
          this.matchCount = this.apiResult.matchCount || 0;
          this.matches = this.apiResult.matches || [];
        }
      }
    }, 400);
  }

  ngOnDestroy() {
    clearInterval(this.progressTimer);
  }

  close(verified: boolean) {
    this.dialogRef.close({ verified, screeningLogId: this.screeningLogId });
  }
}